Shaft or pulley coupling.



'I'. WHITE.

SHAFT 0R PULLEY COUPLING.

, APPLICATION FILED MAR. 23, 1909.

943,209. Patented Dec. 14, 909.

UNITED sutures rn'rnn'r enrich wmra or roam-Ann, ounces.

o sn'nlr'r on 1=ULLEY COUPLING.

Shaft or Pulley Coupling, ofwhich the 1501-,

lowing is a specification.

The object of the present invention is'to provide a simple andinexpensive coupling upon which a pulley or gear may be slipped and verysecurely held to a shaft at the desired points and without the necessityof forming a key receiving groove in'the shaft.

The coupling embodying the present invention is of that type and verysimilar to the coupling shown and described in my prior patent #681,090,August 20,- 1901, the coupling disclosed in which patent is comprised ofcoupling segments each carrying coiiperating wedges one of which isadjustable to cause the other to bear firmly'a-gainst the shaft uponwhich the coupling is mounted and the present invention alms to improvethe construction of the adjustable wedge by so forming one surface ofthe frame as to limit the adjustment of the said wedge in one directionso as to revent the wedge from sliding through yond its working positionwhile the parts of the coupling are being adjusted and clamped upon theshaft.

Another improvement involved in the present form of coupling over theform shown in my prior patent as above stated, resides in cutting awaythe outer circumferential surface of the coupling segments whereby toreduce the cost of the coupling and the material and work necessary forits production, this cutting away of the said surface of the couplingsegments being accomplished without taking from the segments any oftheir functions.

In the accompanying drawings, Figure 1 is a vertical sectional viewthrough a pulley and showing the same fixed upon a shaft by means of oneof the couplings embodying the present invention. Fig. 2 1s a detailperspective view of the segments of the coupling showing the same inassembled relation, and Fig. 3 is a detail perspective view of one ofthe adjustable wedges of the coupling.

In the drawings, there is shown a shaft 5 and a'pulley 6 which is fixedupon the shaft by means of the coupling embodying the present invention.

As shown in the drawings, the bore of the between its ends as indicatedby the numeral 9, this cutting awa of the said surface of each segmentresulting in end flanges 10 and Specification of Letters Patent.Patented Dec. 14:, 1909- .ippliea tion filed larch 23, 1909. Serial No.485,253.

11 the flange 10 being located at one end of the segment and the flange11 at the other end thereof, and at this last mentioned end of eachsegment, there is formed, in addition to the flange 11, a flange 12which projects radially beyond the flange 11 and forms an abutmentagainst which seats one end of the hub 7 of the pulley 6, it beingunderstood that the several segments or sections of the coupling are tobe assembled so as to form a. substantially cylindrical bushing such asis shownin Fig. 2 of the drawings and that this bushing is inserted inthe hub of the pulley with the flanges 12 abutting against one end ofthe said stated. j

It will be observed from an inspection of Fig. 2 of the drawings'thateach of the segments 8 is formed with a longitudinally extending slot 13and that the flanges 10 are forme each with a notch 14 communicating oropening into the slot 13 and that the flanges 12 and 11 are formed witha short radial slot 15 opening also into the respective slot 13. Asshown in Fig. 1 of the drawings, there is disposed, in each of the slots13, a wedge-shaped block 16, the major end of which is presented towardthat end of the bushing at which the flanges 12 are formed. After thesegments of the bushing have been assembled about the shaft 5 and in thehub of the pulley 6 and the wedges 16 have been disposed in theirrespective slots 13 in the said segments 8, an adjusting wedge 17 isinserted through the notch 14 in the flange 10 of each segment 8 and isformed at its minor end, which end is presented in the direction of thatend of the bushing at which the flange 12 is formed, with a threadedstud 18 which projects through the slots 15 in the flanges 11 and 12.Upon the stud 18 of each adjusting wedge 17 is threaded an adjustin nut19 and this nut bears against that en of the respective segment 8 atwhich the flanges 11 and 12 are formed, so that when it istightened,-the adjusting wedge 17 will be drawn in the direction of thesaid end of pulley hub as heretofore the segment and will exert awedging action against the corresponding wedge 16.

As shown in Fi 1 and 3 of the drawings,

the adjusting w ge 17 has that face which bears against the wall of thebore of the hub of the pulley formed with a plurality of ribs 20 whlchextend longitudinall of the said face of the wedge and from t e minorend to a point adjacent the major extremity of the said wedge andthroughout the remainder of the length of the said face of the adjustingwedge, it is formed with shorter ribs 21 WhlCh are alternately arrangedwith respect to the ribs 20. It will be readily understood that the ribs20 and 21, bite into the wall of the bore of the hub and therebyprevent, eifectually, rotation of the pulley with respect to thebushing. It will be understood. of course that by providing several ofthe segments or in other words by forming the bushing in severalsections and providing 'upon each section a wedge adjustment,

wedging action will be inserted between the shaft and'pulley at aplurality of equi-distantlylocated points so that by comparative carefuladjustment the pulley ma be exactly centered with respect to the shaft.It will further be understood that by arranging the ribs 21 alternatelywith respect to the ribs 20, such degree of frictional engagement willbe had between the rib faces of the wedges and the wall of the bore ofthe hub 7, when the ribs 20 and 21 are all contactin -with the surfaceof the said wall of the hu of the bore, as will effectually prevent theadjusting wedges dropping through the notches and openings to too greata degree when the parts of the device are being assembled upon theshaft.

What is claimed is l 1. In a device of the class described, a bodyformed with a slot and to embrace a shaft, a wedge fitted in the slot inthe body and bearin against the shaft, and an adjusting we ge carried bythe body and cooperating with the first mentioned wedge,

the said adjusting wedge having aface to engage with the wall of a hubbore, the said face of the said adjusting wedge being provided withalternately arranged long and short ribs.

2. In a device of the class described, a body formed with a slot and toembrace a shaft, a wedge fitted in the slot in the body and bearinagainst the shaft, and an adjusting we ge carried by the body andcooperating with the first mentioned wedge, the said adjusting wedgehaving a face to engage with the wall of a hub bore, long ribs formedupon the said face and shorter ribs formed upon the face and arranged instaggered relation with respect to the lon ribs.

3. In a device of .the class descri ed, a body formed with a slot and tofit a shaft, a wedge 'dis osed in said slot and bearing against the saft,- the body bein formed at one end with a flange and the flange beingformed with an opening, a wedge disposed upon the first mentioned wedgeand held in position thereon by the body, the last mentioned wedge beingformed with a threaded rection of the flange, the wedge being formedupon its face opposite to that one which bears against the firstmentioned wedge-with ribs extending from that end at which the stud isformed to a point adjacent the opposite end of the wedge and withshorter ribs extending from the said opposite end of the wedge to thepoint of termination of the first mentioned ribs at the respective end,the shorter ribs being alternated with the first mentioned ribs.

In testimony that I claim the foregoing as against the flange andadjustable to my own, I have, hereto aflixed my signature in thepresence of two witnesses.

TILMAN WHITE.

Witnesses:

N. CAMPBELL, GEO. W. MORGAN.

